Glycogen

Definition

A polysaccharide composed of glucose units, stored in animal tissues as a source of energy. In entomology, it is also found in insect tissues where it serves a similar function of energy storage.

Etymology

From Greek 'glykos' meaning 'sweet' and 'genes' meaning 'produced'.

Example

Glycogen stores are depleted during periods of low blood sugar.

Related Terms

• Glucose
• Carbohydrate
• Energy storage

Usage Notes

Glycogen is stored in liver and muscle cells, as well as in the tissues of insects.